LIGHTWEIGHT ALUMINUM BODY: This pre-drilling leather punch tool can scribe, stake, and prepare nail or screw holes. It's easy to use, and the one-handed spring tension adjusts for light or heavy strokes and marking on wood and metal surfaces. HARDENED STEEL POINT: Fabricated from durable aluminum alloy, our convenient metal punch tool has a conical-shaped steel tip that allows you to safely drill holes at the exact location without slipping and damaging the work surface. ONE-HANDED SPRING IMPACT: Ideal for metal workers, machinists, automotive repair professionals, and DIYers, this spring-loaded center punch has an automatic mechanism that strikes with downward pressure so that you don't need a hammer. KNURLED FINGER GRIP: Allows a sturdy grip, easy handling, and less slippage, avoiding potential injury. Add this product to your mechanic accessories, metalsmithing tools, and other utility and hardware essentials. GENERAL TOOLS: We have been a recognized leader in the innovation, design, and development of specialized precision tools for many years. We encourage craftspeople, artisans, and DIYers to work smarter, measure better, and increase productivity. A life saving tool when trapped in an automobile Shatters side windows for ease of escape even under water Preferred tool to free victims trapped in automobiles by: paramedics, police, and fire rescue Body diameter 5/8" and overall length 5"